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OVER DRIVE 2nd

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The overdrive step it is 2nd.

R21 4.75k Cathode bias resistance. Because it is value of large texture, the electric current which flows decreases.

R22 100k Plate load resistance. Because cathode bias is 4.75k, whether already it is good enlarging a little

R24 4.75k It is designed in such a way that it can modify bias with the switch

R25 500k Resistance for partial pressure

R26 500k Resistance for partial pressure. - 6dB it has done combining with R25

R27 500k The resistance for HPF. It is connected to the grid of the next step directly. Being the case that you put HPF in the place where grid electric current flows, it is secure to be a some influence in harmonic overtone constitution of the distortion.

C19 1000p The condenser in order to hold down high tightness

C22 2200p Condenser for connection. Fc=72Hz

C23 2.2u When the boost switch is turned to ON, the condenser which works. About Fc=31Hz

C24 470p HPF which is combined with R27. As for here whether liver

SW11 * Boost switch like ones

R21	4.75k	Cathode bias resistance. Because it is value of large texture, the electric current which flows decreases.
R22	100k	Plate load resistance. Because cathode bias is 4.75k, whether already it is good enlarging a little
R24	4.75k	It is designed in such a way that it can modify bias with the switch
R25	500k	Resistance for partial pressure
R26	500k	Resistance for partial pressure. - 6dB it has done combining with R25
R27	500k	The resistance for HPF. It is connected to the grid of the next step directly. Being the case that you put HPF in the place where grid electric current flows, it is secure to be a some influence in harmonic overtone constitution of the distortion.
C19	1000p	The condenser in order to hold down high tightness
C22	2200p	Condenser for connection. Fc=72Hz
C23	2.2u	When the boost switch is turned to ON, the condenser which works. About Fc=31Hz
C24	470p	HPF which is combined with R27. As for here whether liver
SW11	*	Boost switch like ones